Production, Transportation, Placement and Compaction Equipment Advances for
Enhanced HMA Quality
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Control of Temperature
•Production•Storage•Transportation•Placement•Compaction
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Flue Gasses
High CO but Low NOx Low CO but High NOx
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Burner Technology
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Linkage Drive motors
Flue Gas Characterization
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Production Temperature
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Production Temperature
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Silo Storage
Decreased Oxidation163oC127oC
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
• Heat transfer is thermal energy in transit due to a spatial temperature difference– The greater the difference in temperature between
an object and its surroundings the greater the heat transfer rate will be.
• Newton’s Law of Cooling– The law states that the rate of change of the
temperature of an object is proportional to the difference between its initial temperature T0 and the ambient temperature Ta at time t.
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Temperature Transfer
Transportation
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Δ T
Temperature Trial
• Denver, Co – 2/19/2009• 200 tons surface mix• 20% RAP
• Ambient temperature 6oC• 105oC behind screed
• Pavement density 94.6%
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Compaction
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Intelligent Compaction
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Better Temperature Control
Thank you
CUPGA 2009Dennis Hunt, Gencor Industries, Inc.
Top Related